如何在javascript中从字符串中选择一些字符

Question

我有一个像url的字符串 ＆＃34; example.com/Apps/Visitor/visitscanner" ， ＆＃34; example.com/Apps/Seatings/visitscanner

我想在＆＃34;＆＃34; http://example.com/Apps/＆＃34;之后选择目录名称。

以上示例网址，如果我的网址字符串为＆＃34; http://example.com/Apps/Visitor/visitscanner＆＃34;这一个，结果应该像＆＃34;访客＆＃34;。

我如何在javascript中执行此操作？

Answer 1

您可以使用split()，例如：

var str = "example.com/Apps/Visitor/visitscanner";
var parts = str.split('/');
console.log( parts[parts.length - 2] ); //Visitor

Answer 2

如果您想匹配"http://example.com/Apps/Visitor/visitscanner/foo"或"http://example.com/Apps/Visitor"等网址，可以使用正则表达式执行此操作...

var url = "http://example.com/Apps/Visitor/visitscanner";
var match = /^(https?:\/\/)?example.com\/apps\/([^/]+)/i.exec(url);
var directory = match[2]; // get the second match group ("Visitor")

Live Demo

Answer 3

你可以使用正则表达式： -

var url = "http://example.com/Apps/Visitor/visitscanner";
var dirName  = /\/\/.+?\/Apps\/(.+?)(?=\/)/g.exec(url)[1];